CVE-2026-73198 Ipa: freeipa: unauthenticated dos in `/ipa/i18n_messages` via unbounded request body read
Unauthenticated attackers can cause denial of service in FreeIPA by sending large request bodies to the i18n_messages endpoint, exhausting server memory.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-73198?
CVE-2026-73198 is a high-severity denial of service vulnerability in Redhat Enterprise Linux, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in FreeIPA. A remote, unauthenticated attacker can exploit a vulnerability in the `/ipa/i18n_messages` endpoint by sending an arbitrarily large request body. This can cause the service to consume excessive memory, leading to memory exhaustion, degraded responsiveness, and a denial of service (DoS) condition.
Weakness: CWE-770
Which versions are affected by CVE-2026-73198?
It affects 2 products.
Products include Freeipa Freeipa, Redhat Enterprise Linux.
How do I fix CVE-2026-73198?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-73198 being exploited?
There is no known exploitation of CVE-2026-73198 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
- CVE-2015-5284 Information disclosure in n/a
- CVE-2026-11861 Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relationships
- CVE-2024-2698 Freeipa: delegation rules allow a proxy service to impersonate any user to access another target service
- CVE-2012-5631 Information disclosure in ipa
- CVE-2017-11191 Security feature bypass in n/a
Sources
Also known as DEBIAN-CVE-2026-73198, GHSA-p44q-gpjc-mgm9, UBUNTU-CVE-2026-73198.